kernel: protection fault trap, code=0 Stopped at sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace sys_msgrcv(ffff80002a7e59c0,ffff80003c9a7b20,ffff80003c9a7a70) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7e59c0,ffff80003c9a7b20,ffff80003c9a7a70) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c9a7b20) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9a7b20) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf584bf6bac0, count: -3 ddb> show registers rdi 0 rsi 0x200000001208 rbp 0xffff80003c9a7a40 rbx 0 rdx 0xffff8000014693c0 rcx 0 rax 0xa r8 0x7f7fffffc000 r9 0 r10 0x4e7e066760a8e7fa r11 0xa5204d73480a962d r12 0xfffffd806665dd78 r13 0xdeafbeaddeafbead r14 0xffff8000014c4200 r15 0xa rip 0xffffffff81fd6eb2 sys_msgrcv+0x3f2 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c9a79a0 ss 0x10 sys_msgrcv+0x3f2: movq 0x10(%r13),%rdi ddb> show proc PROC (syz-executor) tid=65017 pid=82389 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=80, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7e4f80,0xffff800036d382c8 process=0xffff8000ffff9b48 user=0xffff80003c9a2000, vmspace=0xfffffd8074aff018 estcpu=30, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 24413 8178 38494 0 2 0 syz-executor 24413 46211 38494 0 3 0x4000080 fsleep syz-executor 49308 142275 96979 0 2 0 syz-executor 49308 426879 96979 0 3 0x4000080 fsleep syz-executor 49308 135972 96979 0 3 0x4000080 fsleep syz-executor 49308 384338 96979 0 3 0x4000080 fsleep syz-executor 82389 91572 83296 0 2 0 syz-executor *82389 65017 83296 0 7 0x4000000 syz-executor 82389 248991 83296 0 3 0x4000080 fsleep syz-executor 82389 108423 83296 0 2 0x4000000 syz-executor 87150 16788 105 0 2 0 syz-executor 87150 365071 105 0 3 0x4000000 smrbar syz-executor 87150 161559 105 0 2 0x4000000 syz-executor 454 103493 51801 0 3 0x80 nanoslp syz-executor 454 223245 51801 0 3 0x4000080 kqsel syz-executor 454 182812 51801 0 3 0x4000080 fsleep syz-executor 454 341403 51801 0 3 0x4000080 fsleep syz-executor 95732 256993 92693 0 2 0 syz-executor 95732 654 92693 0 3 0x4000080 kqread syz-executor 95732 7254 92693 0 3 0x4000080 fsleep syz-executor 95732 191126 92693 0 3 0x4000080 fsleep syz-executor 69261 226404 0 0 3 0x14200 acct acct 38494 337403 66423 0 3 0x82 nanoslp syz-executor 5167 34606 0 0 3 0x14200 bored sosplice 26269 411640 1 0 3 0x100083 ttyopn getty 51801 366638 66423 0 3 0x82 nanoslp syz-executor 45548 70216 66423 0 3 0x82 wait syz-executor 83296 324098 66423 0 3 0x82 nanoslp syz-executor 92693 489729 66423 0 3 0x82 nanoslp syz-executor 96979 493120 66423 0 3 0x82 nanoslp syz-executor 35796 214957 66423 0 2 0x2 syz-executor 105 396257 66423 0 3 0x82 nanoslp syz-executor 66423 254333 57147 0 3 0x82 kqread syz-executor 57147 287150 52537 0 3 0x10008a sigsusp ksh 52537 307145 56659 0 3 0x98 kqread sshd-session 56659 253014 14362 0 3 0x92 kqread sshd-session 14362 111257 1 0 3 0x88 kqread sshd 484 207744 28466 73 3 0x1100090 kqread syslogd 28466 179600 1 0 3 0x100082 sbwait syslogd 50899 234320 1 0 3 0x100080 kqread resolvd 73153 67575 65242 77 3 0x100092 kqread dhcpleased 55393 371862 65242 77 3 0x100092 kqread dhcpleased 65242 33805 1 0 3 0x80 kqread dhcpleased 62099 142551 0 0 3 0x14200 bored smr 52615 290826 0 0 2 0x14200 zerothread 59915 61379 0 0 3 0x14200 aiodoned aiodoned 57737 382979 0 0 3 0x14200 syncer update 1810 171826 0 0 3 0x14200 cleaner cleaner 1648 6996 0 0 3 0x14200 reaper reaper 30172 245125 0 0 3 0x14200 pgdaemon pagedaemon 25918 133199 0 0 3 0x14200 bored viomb 10962 519878 0 0 3 0x40014200 acpi0 acpi0 59366 381852 0 0 3 0x14200 bored softnet7 27193 448189 0 0 3 0x14200 bored softnet6 92250 290972 0 0 3 0x14200 bored softnet5 75567 421494 0 0 3 0x14200 bored softnet4 52852 132105 0 0 3 0x14200 bored softnet3 60318 260201 0 0 3 0x14200 bored softnet2 41597 11249 0 0 3 0x14200 bored softnet1 69909 277600 0 0 3 0x14200 bored softnet0 37230 369511 0 0 3 0x14200 bored systqmp 38009 263585 0 0 3 0x14200 bored systq 73458 414099 0 0 3 0x40014200 tmoslp softclock 12614 161689 0 0 3 0x40014200 idle0 1 91217 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 11191K 11495K 166960K 11832 0 pcb 18 12K 12K 166960K 80 0 rtable 195 5K 6K 166960K 317 0 pf 31 13K 13K 166960K 42 0 ifaddr 42 7K 7K 166960K 53 0 ifgroup 50 2K 2K 166960K 62 0 sysctl 3 1K 9K 166960K 7 0 counters 32 17K 18K 166960K 36 0 ioctlops 0 0K 4K 166960K 48 0 iov 0 0K 12K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1350 85K 85K 166960K 1579 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 387 0 sigio 1 0K 0K 166960K 40 0 proc 63 67K 100K 166960K 529 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 90 0 in_multi 96 7K 7K 166960K 119 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 391 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 244 151K 164K 166960K 5135 0 UVM aobj 18 2K 2K 166960K 18 0 pinsyscall 39 78K 94K 166960K 1454 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 11 0K 2K 166960K 34 0 temp 52 8673K 8737K 166960K 15952 0 kqueue 14 22K 26K 166960K 63 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 55 0 52 1 0 1 1 0 8 0 rtentry 136 114 0 28 4 0 4 4 0 8 0 unpcb 144 252 0 236 5 1 4 4 0 8 3 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 80 0 74 1 0 1 1 0 8 0 arp 88 13 0 1 1 0 1 1 0 8 0 inpcb 328 320 0 310 7 0 7 7 0 8 5 ip6q 72 3 0 2 1 0 1 1 0 8 0 ip6af 40 5 0 4 1 0 1 1 0 8 0 nd6 104 22 0 6 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 2 0 2 2 1 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pfstkey 128 2 0 2 1 1 0 1 0 8 0 pfstate 384 1 0 1 1 1 0 1 0 8 0 pfrule 1344 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 522 0 115 30 0 30 30 0 8 2 art_table 40 524 0 115 5 0 5 5 0 8 0 art_node 32 114 0 39 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 10 2 1 1 1 0 8 0 semapl 112 5 0 1 1 0 1 1 0 8 0 shmpl 112 15 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1977 0 475 95 0 95 95 0 8 0 ffsino 248 1977 0 475 95 0 95 95 0 8 0 nchpl 144 2491 0 805 63 0 63 63 0 8 0 uvmvnodes 80 2207 0 0 46 0 46 46 0 8 0 vnodes 216 2207 0 0 123 0 123 123 0 8 0 namei 1024 8137 0 8137 2 1 1 2 0 8 1 kstatmem 264 30 0 8 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 8326 0 8326 8 7 1 8 1 8 1 plimitpl 152 63 0 47 1 0 1 1 0 8 0 sigapl 424 673 0 621 7 1 6 7 0 8 0 knotepl 120 11169 0 11121 15 6 9 9 0 8 7 kqueuepl 184 86 0 75 1 0 1 1 0 8 0 pipepl 296 120 0 92 3 0 3 3 0 8 0 fdescpl 440 651 0 621 5 1 4 5 0 8 0 filepl 120 3119 0 2899 9 0 9 9 0 8 1 lockfpl 104 170 0 167 1 0 1 1 0 8 0 lockfspl 48 83 0 80 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 37 0 21 1 0 1 1 0 8 0 ucredpl 104 314 0 302 1 0 1 1 0 8 0 zombiepl 144 781 0 780 2 1 1 1 0 8 0 processpl 1160 673 0 621 5 1 4 5 0 8 0 procpl 656 1112 0 1045 6 0 6 6 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 528 635 0 606 9 2 7 7 0 8 4 mcl64k 65536 74 0 74 2 1 1 1 0 8 1 mcl8k 8192 5 0 5 2 1 1 1 0 8 1 mcl4k 4096 2755 0 2704 15 7 8 14 0 8 1 mcl2k 2048 524 0 521 2 1 1 2 0 8 0 mtagpl 96 10 0 5 1 0 1 1 0 8 0 mbufpl 256 6466 0 6279 19 0 19 19 0 8 5 bufpl 280 3284 0 118 227 0 227 227 0 8 0 anonpl 24 131812 0 128548 45 0 45 45 0 187 19 amapchunkpl 152 16039 0 15504 31 3 28 28 0 158 7 amappl16 200 2665 0 2633 18 8 10 15 0 8 7 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 111 0 101 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 1280 0 1251 3 1 2 3 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 27 0 26 1 0 1 1 0 8 0 amappl7 128 100 0 90 1 0 1 1 0 8 0 amappl6 120 189 0 185 1 0 1 1 0 8 0 amappl5 112 117 0 111 1 0 1 1 0 8 0 amappl4 104 285 0 271 1 0 1 1 0 8 0 amappl3 96 2884 0 2764 4 0 4 4 0 8 1 amappl2 88 637 0 581 2 0 2 2 0 8 0 amappl1 80 9268 0 8723 15 2 13 13 0 8 0 amappl 88 4432 0 4251 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 17 0 0 1 0 1 1 0 8 0 uaddrrnd 24 651 0 621 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 651 0 621 1 0 1 1 0 8 0 vmmpekpl 168 6725 0 6688 2 0 2 2 0 8 0 vmmpepl 168 47765 0 45876 95 2 93 93 0 357 6 vmsppl 360 650 0 621 4 1 3 4 0 8 0 rwobjpl 32 18009 0 14907 26 0 26 26 0 8 0 pdppl 4096 1309 0 1242 105 38 67 81 0 8 0 pvpl 32 315065 0 306093 111 5 106 106 0 265 18 pmappl 216 650 0 621 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 284 0 53 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_msgrcv(ffff80002a7e59c0,ffff80003c9a7b20,ffff80003c9a7a70) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7e59c0,ffff80003c9a7b20,ffff80003c9a7a70) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c9a7b20) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9a7b20) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf584bf6bac0, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_msgrcv(ffff80002a7e59c0,ffff80003c9a7b20,ffff80003c9a7a70) at sys_msgrcv+0x3f2 msg_copyout sys/kern/sysv_msg.c:639 [inline] sys_msgrcv(ffff80002a7e59c0,ffff80003c9a7b20,ffff80003c9a7a70) at sys_msgrcv+0x3f2 sys/kern/sysv_msg.c:349 syscall(ffff80003c9a7b20) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9a7b20) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf584bf6bac0, count: -3